Central Bureau for Astronomical Telegrams
IAUC 2952: DETECTION OF THE OPTICAL REMNANT OF THE SN OF 1006; 1974 XII; 1975f
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Circular No. 2952
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
DETECTION OF THE OPTICAL REMNANT OF THE SUPERNOVA OF 1006
S. van den Bergh, David Dunlap Observatory, reports that a
delicate wisp of filamentary nebulosity has been found about 10'
north-northwest of the radio position of the Lupus supernova of
1006. Its center is at R.A. = 14h59m06s, Decl. = -41o32'.1 (equinox
1950.0). Red and blue plates obtained with the 400-cm reflector at
Cerro Tololo Interamerican Observatory show that the nebulosity
appears as bright in the red (098 + RG1) as in the green (IIIa-J +
GG 13). The length of the nebulous filaments is about 9', and its
thickness varies from about 1" to 8" in regions where it is double.
The morphology of the filaments is very reminiscent of that of the
optical remnant of the type I supernova of 1572.
COMET VAN DEN BERGH (1974 XII)
The following precise positions have been obtained by G.
Schwartz and C. Y. Shao with the 155-cm reflector at Harvard
Observatory's Agassiz Station. Measurers: Shao and R. E. McCrosky.
1975 UT R. A. (1950) Decl.
Oct. 8.26184 3 41 57.04 +10 21 31.0
Nov. 7.23451 3 31 23.05 + 7 04 17.1
Dec. 2.09207 3 21 05.78 + 4 38 05.0
Continuation to the ephemeris on IAUC 2773:
1976/77 ET R. A. (1950) Decl. Delta r m2
July 1 4 23.85 + 0 05.8 8.419 7.668 19.5
11 4 28.96 - 0 24.7
21 4 33.64 - 1 00.1 8.289 7.750 19.5
31 4 37.84 - 1 40.5
Aug. 10 4 41.46 - 2 25.8 8.109 7.833 19.5
20 4 44.43 - 3 15.6
30 4 46.69 - 4 09.6 7.903 7.918 19.5
Sept. 9 4 48.18 - 5 07.2
19 4 48.84 - 6 07.3 7.699 8.003 19.5
29 4 48.67 - 7 09.0
Oct. 9 4 47.66 - 8 10.9 7.533 8.089 19.5
19 4 45.86 - 9 11.4
29 4 43.34 -10 09.0 7.435 8.176 19.5
Nov. 8 4 40.23 -11 01.8
18 4 36.69 -11 48.4 7.432 8.263 19.5
28 4 32.90 -12 27.5
Dec. 8 4 29.08 -12 58.1 7.538 8.352 19.6
18 4 25.44 -13 20.0
28 4 22.16 -13 33.2 7.748 8.441 19.7
Jan. 7 4 19.42 -13 38.3
17 4 17.33 -13 36.2 8.044 8.531 19.8
27 4 15.99 -13 28.1
Feb. 6 4 15.45 -13 15.2 8.394 8.622 20.0
16 4 15.69 -12 59.1
26 4 16.72 -12 40.8 8.765 8.713 20.1
Mar. 8 4 18.48 -12 21.7
18 4 20.90 -12 02.9 9.124 8.805 20.2
28 4 23.93 -11 45.2
Apr. 7 4 27.48 -11 29.7 9.444 8.898 20.4
17 4 31.48 -11 16.9
27 4 35.84 -11 07.5 9.705 8.991 20.5
m2 = 6.0 + 5 log Delta + 10 log r
PERIODIC COMET WOLF (1975f)
Continuation to the ephemeris on IAUC 2740:
1976/77 ET R. A. (1950) Decl. Delta r m2
June 21 3 42.68 +11 40.2 3.473 2.692 20.0
July 1 3 59.39 +11 30.0
11 4 15.52 +11 09.3 3.360 2.742 20.0
21 4 30.95 +10 37.6
31 4 45.57 + 9 54.7 3.214 2.797 20.0
Aug. 10 4 59.21 + 9 00.6
20 5 11.73 + 7 55.4 3.041 2.856 20.0
30 5 22.96 + 6 39.3
Sept. 9 5 32.70 + 5 12.8 2.853 2.917 19.9
19 5 40.77 + 3 36.9
29 5 46.96 + 1 52.9 2.665 2.982 19.9
Oct. 9 5 51.08 + 0 02.8
19 5 52.98 - 1 50.5 2.497 3.048 19.8
29 5 52.58 - 3 43.2
Nov. 8 5 49.93 - 5 30.3 2.379 3.117 19.8
18 5 45.24 - 7 06.4
28 5 38.93 - 8 25.7 2.337 3.187 19.9
Dec. 8 5 31.62 - 9 23.5
18 5 24.07 - 9 57.0 2.393 3.258 20.0
28 5 17.01 -10 05.6
Jan. 7 5 11.14 - 9 51.5 2.548 3.330 20.3
17 5 06.91 - 9 18.4
27 5 04.59 - 8 31.0 2.785 3.402 20.5
Feb. 6 5 04.27 - 7 33.9
16 5 05.88 - 6 31.5 3.079 3.475 20.9
1976 May 18 (2952) Brian G. Marsden
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